http://llvm.org/bugs/show_bug.cgi?id=10275
Summary: format function attribute isn't checked in Objective-C
methods
Product: clang
Version: 2.9
Platform: Macintosh
OS/Version: MacOS X
Status: NEW
Severity: normal
Priority: P
Component: Frontend
AssignedTo: [email protected]
ReportedBy: [email protected]
CC: [email protected]
The following code:
#import <Foundation/NSString.h>
@interface Test
+ (void)test2:(NSString *)format, ... __attribute__((format(__NSString__, 1,
2)));
+ (void)test3:(const char *)format, ... __attribute__((format(__printf__, 1,
2)));
- (void)test4:(NSString *)format, ... __attribute__((format(__NSString__, 1,
2)));
- (void)test5:(const char *)format, ... __attribute__((format(__printf__, 1,
2)));
@end
void function(void) {
[Test test2:@"%d"];
[Test test2:@"%d", "foo"];
[Test test3:"%d"];
[Test test3:"%d", "foo"];
Test *t;
[t test4:@"%d"];
[t test4:@"%d", "foo"];
[t test5:"%d"];
[t test5:"%d", "foo"];
}
which uses both the __printf__ and the __NSString__ archetypes in the format
function attribute, doesn't yield any compiler warnings even though there's a
mismatch in the number of arguments and the argument types:
$ clang -c -Wformat bug1.m
$
This has been tested with:
$ clang --version
Apple clang version 2.0 (tags/Apple/clang-137) (based on LLVM 2.9svn)
Target: x86_64-apple-darwin10
Thread model: posix
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